20 Best Boat Trailer Lights [2024]

Are you looking for the best boat trailer lights? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling boat trailer lights.

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1 CZC AUTO 2PCS 12V LED Submersible Low Profile Rectangular Trailer Lights, Tail Stop Turn Running... CZC AUTO 2PCS 12V LED Submersible Low Profile Rectangular Trailer Lights, Tail Stop Turn Running...
2 CZC AUTO 12V LED Low Profile Submersible Rectangular Trailer Light Kit Tail Stop Turn Running Lights... CZC AUTO 12V LED Low Profile Submersible Rectangular Trailer Light Kit Tail Stop Turn Running...
3 MaxxHaul 70205 Trailer Light Kit - 12V All LED , Left and Right Waterproof Submersible for Trailers,... MaxxHaul 70205 Trailer Light Kit - 12V All LED , Left and Right Waterproof Submersible for...
4 CZC AUTO 12V LED Submersible Left and Right Trailer Lights Stop Tail Turn Signal Lights for Under 80... CZC AUTO 12V LED Submersible Left and Right Trailer Lights Stop Tail Turn Signal Lights for Under...
5 Linkitom New Submersible LED Trailer Light Kit, Super Bright Brake Stop Turn Tail License Lights for... Linkitom New Submersible LED Trailer Light Kit, Super Bright Brake Stop Turn Tail License Lights...
6 Partsam 12V Waterproof Square Led Trailer Light,Red LED Stop Turn Tail License Brake Running Light... Partsam 12V Waterproof Square Led Trailer Light,Red LED Stop Turn Tail License Brake Running...
7 15' 9 LED 3 Red Trailer Light Bar [DOT FMVSS 108] [SAE P2] [IP67 Submersible] Identification Running... 15" 9 LED 3 Red Trailer Light Bar [DOT FMVSS 108] [SAE P2] [IP67 Submersible] Identification...
8 CZC AUTO 12V Submersible LED Trailer Tail Light Kit for Under 80 Inch Trailer Boat utility Trailer... CZC AUTO 12V Submersible LED Trailer Tail Light Kit for Under 80 Inch Trailer Boat utility...
9 12V LED Trailer Lights, Submersible and Waterproof Low Profile Rectangular tail lights for RV,... 12V LED Trailer Lights, Submersible and Waterproof Low Profile Rectangular tail lights for RV,...
10 Partsam Submersible Under 80' LED Trailer Light Kit,Square Stop Turn Tail RV Truck Lights w/Wire... Partsam Submersible Under 80" LED Trailer Light Kit,Square Stop Turn Tail RV Truck Lights w/Wire...
11 Linkitom 2021 New Submersible LED Trailer Light Kit, Super Bright Fully Waterproof Tail Lights,... Linkitom 2021 New Submersible LED Trailer Light Kit, Super Bright Fully Waterproof Tail Lights,...
12 Linkitom Submersible LED Trailer Light Kit, Super Bright Brake Stop Turn Tail License Lights for... Linkitom Submersible LED Trailer Light Kit, Super Bright Brake Stop Turn Tail License Lights for...
13 Kohree New LED Submersible Trailer Tail Light Kit, 12V LED Utility Trailer Lights DOT Approval,... Kohree New LED Submersible Trailer Tail Light Kit, 12V LED Utility Trailer Lights DOT Approval,...
14 Linkitom New Halo Rectangle Submersible LED Trailer Light, Super Bright Brake Stop Turn Tail License... Linkitom New Halo Rectangle Submersible LED Trailer Light, Super Bright Brake Stop Turn Tail...
15 12V Trailer Light Kit DOT Certified Utility Trailer Lights for Boat RV Car Easy Assembly with Wire... 12V Trailer Light Kit DOT Certified Utility Trailer Lights for Boat RV Car Easy Assembly with...
16 Left+Right/over 12 LED super diodes for each light/AUTO 2PCS 12V LED Submersible Low Profile... Left+Right/over 12 LED super diodes for each light/AUTO 2PCS 12V LED Submersible Low Profile...
17 Nilight TL-20 2PCS Submersible Kit Low Profile Rectangular LED Stop Tail Turn Signal Side Marker... Nilight TL-20 2PCS Submersible Kit Low Profile Rectangular LED Stop Tail Turn Signal Side Marker...
18 Linkitom 6 Inchs Submersible Oval LED Stop/Turn Trailer Tail Light with Waterproof Rubber Gaskets... Linkitom 6 Inchs Submersible Oval LED Stop/Turn Trailer Tail Light with Waterproof Rubber Gaskets...
19 ONLTCO 12V Red Led Square Submersible Trailer Lights, Turn Signal License Brake Tail Light Kit for... ONLTCO 12V Red Led Square Submersible Trailer Lights, Turn Signal License Brake Tail Light Kit...
20 Linkitom New Halo Submersible LED Trailer Light, Super Bright Brake Stop Turn Tail License Lights... Linkitom New Halo Submersible LED Trailer Light, Super Bright Brake Stop Turn Tail License Lights...
Bestseller No. 1
CZC AUTO 2PCS 12V LED Submersible Low Profile Rectangular Trailer Lights, Tail Stop Turn Running...
  • CZC AUTO multifunctional rectangular trailer tail light. It combines stop, running, turn signal indicator lighting and license plate illumination. The...
  • Waterproof rater IP68. Excellent waterproof/Submersible lights for trailer. Sonic Welding Whole Sealing Technology ensures sealing solidity of the LED...
  • All diodes are LED, NOT incandescent bulbs! 100% quality inspection before shipping including photometric inspection. The marine LED trailer lights...
  • Package includes: 2 pcs submersible trailer lights, 1 bag mounting hardware and 1 installation instruction. Please make sure no electronic short of...
  • CZC AUTO, a reliable brand in trailer lights industry. we offer 30-day money-back guarantee for any reason, 12-month warranty for quality-related...
Bestseller No. 2
CZC AUTO 12V LED Low Profile Submersible Rectangular Trailer Light Kit Tail Stop Turn Running Lights...
  • Kit includes 2 combination Submersible running/stop/tail/turn signal lights,license plate bracket and Mounting Hardware, 25ft length of 4 pin wire...
  • Waterproof and Submersible Feature and Testing(2nd Image):We placed light underwater for 3 hour by 3 times each day ,total 5 days,the light...
  • Left light have 22 diodes which include 4 diodes for lincense plate light function,Right light have 18 diode. Super bright LED quality ,Complies with...
  • Each rectangular light size:8" Length* 2-3/4" width* 3" height,Stainless steel hardware for under and over80" marine towing vechiles
  • CLIENT SUPPORT: Please feel free to contact us at first if there is any problem when you receive or use our products. We are always here to support...
Bestseller No. 3
MaxxHaul 70205 Trailer Light Kit - 12V All LED , Left and Right Waterproof Submersible for Trailers,...
  • Kit includes stop, tail and turn signal lights, two amber clearance lights and wiring harness
  • Includes 23 and 4 foot 4-pole color coded wiring harness. Product Type: Lighting and Electrical
  • High visibility LED taillights last longer than standard incandescent lights
  • Complies with DOT standards; Side lens are with standard bulb. Corrosion resistant housing. For trailers less than 80 Inch wide
  • Includes 23-foot wiring harness with UV coated jackets
Bestseller No. 4
CZC AUTO 12V LED Submersible Left and Right Trailer Lights Stop Tail Turn Signal Lights for Under 80...
  • Multi-function Led Trailer Lights: Left and Right LED trailer tail Lights have 6 functions in common: Stop/Turn/Tail/Rear reflector/side...
  • All diodes are LED, NOT incandescent bulbs: 100% quality inspection before shipping including photometric inspection. The marine LED trailer lights...
  • Excellent Waterproof/Submersible Lights for Trailer: Sonic Welding Whole Sealing Technology ensures sealing solidity of the LED tail lights. Further...
  • Easy to Install: 2 optional mounting ways - mounting on the back or the side of the trailer. Please make sure that connect wiring and no electronic...
  • CZC AUTO, a reliable brand in trailer lights industry, we offer 30-day money-back for any reason, 12-month warranty for quality-related issues
Bestseller No. 5
Linkitom New Submersible LED Trailer Light Kit, Super Bright Brake Stop Turn Tail License Lights for...
  • HALO Trailer Light Kit : Trailer tail light kits has everything you need, includes two stop turn LED tail lights(Unique halo glow and solid light...
  • IP68 Waterproof and Submersible: There is no screw on the lamp shade , the LED trailer lights are completely welded together, The circuit board of...
  • Compliant with DOT approved standards: The lamp shade of utility trailer light kit with corrosion resistant ABS material, 100% compliant with DOT...
  • 25ft wiring harness have more durable than the traditional copper coated aluminum wires and split Y-style color coded harness. Fully operable in...
  • Widely Used: Widely applicable to 80 Inch width tractor, such as truck, trailer, boat, bus, lorry, van, caravan, snowmobile, etc. Please make sure...
SaleBestseller No. 6
Partsam 12V Waterproof Square Led Trailer Light,Red LED Stop Turn Tail License Brake Running Light...
  • Application: Universal for Trucks, trailers under 80", tractors, semi-trailer, Dump Truck, bus, boat, special vehicle,etc
  • 15 Diodes ( 12 Red+3 Red ) LED Combination stop turn tail side marker light w/reflector-Curb side; Passenger Side Serves 6 functions: Stop light, Turn...
  • 19 Diodes ( 12 Red+3 Red+4 White ) LED Combination stop turn tail side marker light w/reflector-Street side with license illuminator; Driver Side...
  • Add or upgrade the lights on boat, snowmobile, camper, or utility trailer; High visibility safety lights are EASY TO INSTALL and the wiring details...
  • Package include: 1 Pairs Lights + 2 Gaskets + 4 Screws;
Bestseller No. 7
15" 9 LED 3 Red Trailer Light Bar [DOT FMVSS 108] [SAE P2] [IP67 Submersible] Identification Running...
  • A MUST FOR 80" OR WIDER TRAILERS - Trailers measuring 80" or wider require identification lights for additional visibility; mount this clearance light...
  • DOT-CERTIFIED REFLECTIVE LENS - Unlike cheaper, inferior quality ID bars, our unit boasts a DOT FMVSS-108 rated reflective lens design compliant with...
  • IP67 SUBMERSIBLE RATED - Waterproof and entirely-submersible for unparalleled all-weather usability; mounting bracket features water drainage notch...
  • SOLID CONSTRUCTION - Black bracket is made of long-lasting stainless steel, NOT substandard plastic like other light bar brackets. Stainless hardware...
  • STRAIGHT-FORWARD INSTALLATION- Mounting bracket features notches on its short sides for easy wire routing; positive input wire and ground wire are...
Bestseller No. 8
CZC AUTO 12V Submersible LED Trailer Tail Light Kit for Under 80 Inch Trailer Boat utility Trailer...
  • Left and Right trailer tail Lights have 7 functions : stop/turn/tail/rear reflector/side reflector/side marker light/ license plate light. The trailer...
  • 18 Gauge 100% pure copper wire harness ensure trailer lights LED do good job underwater! All diodes are LED, NOT any incandescent bulbs! 100% quality...
  • Excellent Waterproof/Submersible Lights for Boat Trailer. Sonic Welding Sealing Technology ensures sealing solidity of the tail lights. Every possible...
  • Easy to install the submersible trailer lights. Please make sure that connect wiring and no electronic short before marine/underwater. Wiring diagram...
  • CZC AUTO, we offer 30-day money-back for any reason, 12-month warranty for quality-related issues. PLEASE NOTE: Any problem in using our submersible...
Bestseller No. 9
12V LED Trailer Lights, Submersible and Waterproof Low Profile Rectangular tail lights for RV,...
  • LOW PROFILE SUBMERSIBLE - Our trailer light has everything you need to get your lighting system up and running. Each kit includes two 12V LED tail and...
  • LONG-TERM USE - Do you know that our trailer lights are completely sealed and submersible? Its acrylic len are engineered to block water out and...
  • FULLY COMPLIANT - Our lights are 100% compliant with DOT FMVSS108 standards. This ensures that your lights are federally compliant for visibility,...
  • COST EFFECTIVE - Our premium LED lights are high quality and packed full with value for long lasting lighting. LED lights can last 30-40 times longer...
  • FLEXIBLE SIZING - Our special LED trailer lights are outfitted for trailers measuring up to and over 80 inches wide. Our flexible sizing offers a...
Bestseller No. 10
Partsam Submersible Under 80" LED Trailer Light Kit,Square Stop Turn Tail RV Truck Lights w/Wire...
  • Package included: this 12v led trailer lights kit has verything you need, 2Pcs square combination tail lights, 6Pcs Mini Oval side fender marker...
  • Multi Functions: Function as running light, stop light, brake light, turn signal light, reverse light, flash light, rear reflex reflector, side marker...
  • High Btightness: 15 Diodes ( 12 Red+3 Red ) LED Combination stop turn tail side marker light w/reflector-Curb side; 19 Diodes ( 12 Red+3 Red+4 White )...
  • Waterproof: The square trailer lights kit is completely sealed, it mean no water can enter inside to damage the circuit board. The screws have been...
  • Widely Used: Ideal for most vehicles equipped with 12V power supply such as trailers, campers, trucks, Dump Truck, snowmobile, tractors, semi-trailer,...
Bestseller No. 11
Linkitom 2021 New Submersible LED Trailer Light Kit, Super Bright Fully Waterproof Tail Lights,...
  • Trailer Light Kit : Led boat trailer light kits has everything you need, includes two stop turn signals LED marker lights, two amber clearance lights,...
  • IP68 Waterproof and Submersible: There is no screw on the lamp shade , the LED trailer lights are completely welded together. excellent tightness...
  • Compliant with DOT standards: The lamp shade of utility trailer light kit with a new ABS material, 100% compliant with DOT standards. Combine brake,...
  • 18 AWG 4 Pin Wiring Harness: 25ft wiring harness have more durable than the traditional copper coated aluminum wires and split Y-style color coded...
  • Widely Used: Widely applicable to 80 Inch width tractor, such as truck, trailer, boat, bus, lorry, van, caravan, snowmobile, etc. Please make sure...
Bestseller No. 12
Linkitom Submersible LED Trailer Light Kit, Super Bright Brake Stop Turn Tail License Lights for...
  • Trailer Light Kit : Led boat trailer light kits has everything you need,includes two stop turn signals LED marker lights, two amber clearance lights,...
  • IP68 Waterproof and Submersible: There is no screw on the lamp shade , the LED trailer lights are completely welded together, The circuit board of...
  • Compliant with DOT standards: The lamp shade of utility trailer light kit with a new ABS material, 100% compliant with DOT standards
  • 25ft wiring harness have more durable than the traditional copper coated aluminum wires and split Y-style color coded harness. Fully operable in...
  • Widely Used : Widely applicable to 80 Inch width tractor, such as truck, trailer, boat, bus, lorry, van, caravan, snowmobile, etc. Please make sure...
Bestseller No. 13
Kohree New LED Submersible Trailer Tail Light Kit, 12V LED Utility Trailer Lights DOT Approval,...
  • UPGRADE TRAILER LIGHT: Come with additional atomization strip, Kohree submersible brake tail light kit has superior visibility and faster upon...
  • SEALED WATERPROOF TRAILER LIGHT: No screws on the lamp surface IP68 waterproof, built in epoxy encased electronics and a sonically sealed body to...
  • SURFACE MOUNT: With diodes soldered directly to the surface of a circuit board instead of attached with wires in the drilling-hole board, Kohree 12V...
  • DOT APPROVAL: Kohree hola boat trailer light kit gives your truck a distinctive look and completely street legal, perfect replacement low profile...
  • FULL SERVICE TRAILER LIGHTS KIT: This utility led trailer light kit has everything you need: 1X Rectangle LED combination stop turn tail light(37...
SaleBestseller No. 14
Linkitom New Halo Rectangle Submersible LED Trailer Light, Super Bright Brake Stop Turn Tail License...
  • Set of 2 pack(Unique halo glow and solid light pattern design, different from other trailer taillights on the market), designed for 12v system. left...
  • IP68 Waterproof and Submersible: There is no screw on the lamp shade , the LED trailer lights are completely welded together, The circuit board of...
  • Compliant with DOT standards: The lamp shade of utility trailer light kit with a new ABS material, 100% compliant with DOT standards
  • Easy to instal, The distance of two studs bolts is standard 2”, Direct replacement for your original incandescent bulb unit
  • Widely Used : Widely applicable to 80 Inch width tractor, such as truck, trailer, boat, bus, lorry, van, caravan, snowmobile, etc. Please make sure...
SaleBestseller No. 15
12V Trailer Light Kit DOT Certified Utility Trailer Lights for Boat RV Car Easy Assembly with Wire...
  • Perfect KIT For Under 80" - Everything you need to get your lighting system up and running are included in this trailer light kit. You will have wo...
  • Durable and Waterproof - All hardwares are corrosion-resistant including 22 ft. split Y-style color coded harness. Fully operable in inclement...
  • DOT Compliant - The lights are compliant with DOT FMVSS108 standards. They are federally compliant for visibility, durability and reliability, secures...
  • COST EFFECTIVE - The premium LED tail lights are of high quality for long lasting lighting. This LED lights has a much longer life that last more...
  • One-Size-Fits-All - These special LED trailer lights are perfect for trailers under 80 inches wide. It fits all trailers of different shapes and...
Bestseller No. 16
Left+Right/over 12 LED super diodes for each light/AUTO 2PCS 12V LED Submersible Low Profile...
  • over 12 LED super diodes for each light. Wiring Information: 8" submersible lights have 3 wires (one with ground ring).
  • Included: 2 Red Submersible Trailer Lights. .
  • Function: Stop, Turn, Tail Light, License Plate Illuminator
  • LED Light: Submersible light has LEDs
  • Material: Polycarbonate housing
SaleBestseller No. 17
Nilight TL-20 2PCS Submersible Kit Low Profile Rectangular LED Stop Tail Turn Signal Side Marker...
  • Multi-functions: Combined functions of tail, brake/turn signals, side marker, license plate light. Perfect for 12V DC vehicles with a maximum width of...
  • Excellent Brightness: Left lamp has 27 diodes including 9 diodes for license plate light, right lamp has 12 diodes. Quality LEDs draw less amperage...
  • Entirely Submersible: The inside LEDs and circuit board is fully waterproof sealed to work under water perfectly without electric short risk. The...
  • All-in-one Kit: Comes with everything for your straightforward installation of the light, include lights, license plate bracket, 25ft length trailer...
  • Easy Installation: For light mounting: Lamp with license plate light on the left side, the other on the right side. For wiring routing: Please see...
Bestseller No. 18
Linkitom 6 Inchs Submersible Oval LED Stop/Turn Trailer Tail Light with Waterproof Rubber Gaskets...
  • Super Bright: 24(16+8) bright LED diodes with super high visibility, light up the rear or side of your vehicle or trailer in daylight, midnight,...
  • Waterproof and Submersible: The housing is design of excellent moisture-proof sealed and IP 67 waterproof makes it be definitely waterproof.
  • Compliant with DOT standards: The lamp shade of utility trailer light kit with corrosion resistant ABS material, Durable design for years of use. SAE...
  • Easy Installation: Standard 6" size. Each light comes with an industry standard connector with 12" of wiring for installation. Included black rubber...
  • Brake& Turn Taillight: Function as tail lights or turn/brake lights. Fit for heavy truc, trailer, boat, bus, lorry, van, caravan, snowmobile, etc.,
Bestseller No. 19
ONLTCO 12V Red Led Square Submersible Trailer Lights, Turn Signal License Brake Tail Light Kit for...
  • ✅KIT INCLUDE: 2 Pcs Trailer Lights build in with License Plate Light, Turn Signal Light, Tail Light and Stop Light; 2 Pure Copper Wires: Long Wire...
  • ✅COMPLETE SUBMERSIBLE: We sank the light into the lake under 65ft for half an hour, then picked it up and the lights works well. Water-proof IP68,...
  • ✅MATERIAL: Accessory Wires is 100% Copper Wires; License Plate Bracket made from Polypropylene Plastic; Trailer Lights’ tail light surface and...
  • ✅ALL LED: The lights are all led, 12 LEDs in trailer light surface, 4 LEDs in license plate light surface, 1 LED in turn signal Light surface....
  • ✅BRIGHTNESS: We improved these trailer lights, compared with the old vision, these trailer lights are brighter. Brighter lights are safer in any...
Bestseller No. 20
Linkitom New Halo Submersible LED Trailer Light, Super Bright Brake Stop Turn Tail License Lights...
  • Set of 2 pack(Unique halo glow and solid light pattern design, different from other trailer taillights on the market), designed for 12v system. left...
  • IP68 Waterproof and Submersible: There is no screw on the lamp shade , the LED trailer lights are completely welded together, The circuit board of...
  • Compliant with DOT standards: The lamp shade of utility trailer light kit with a new ABS material, 100% compliant with DOT standards
  • Easy to instal, The distance of two studs bolts is standard 2”, Direct replacement for your original incandescent bulb unit
  • Widely Used : Widely applicable to 80 Inch width tractor, such as truck, trailer, boat, bus, lorry, van, caravan, snowmobile, etc. Please make sure...

Having trouble finding a great boat trailer lights?

This problem is well understood by us because we have gone through the entire boat trailer lights research process ourselves, which is why we have put together a comprehensive list of the best boat trailer lightss available in the market today.

After hours of searching and using all the models on the market, we have found the best boat trailer lights for 2023. See our ranking below!

How Do You Buy The Best Boat Trailer Lights?

Do you get stressed out thinking about shopping for a great boat trailer lights? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching boat trailer lights, which is why we have assembled a comprehensive list of the greatest boat trailer lights available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for boat trailer lights that you consider buying. Your questions might include the following:

  • Is it worth buying an boat trailer lights?
  • What benefits are there with buying an boat trailer lights?
  • What factors deserve consideration when shopping for an effective boat trailer lights?
  • Why is it crucial to invest in any boat trailer lights, much less the best one?
  • Which boat trailer lights are good in the current market?
  • Where can you find information like this about boat trailer lights?

We’re convinced that you likely have far more questions than just these regarding boat trailer lights, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for boat trailer lights, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible boat trailer lights. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an boat trailer lights buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available boat trailer lights currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of boat trailer lights has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an boat trailer lights?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your boat trailer lights.
  5. Customer Ratings: Number ratings grade boat trailer lights objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their boat trailer lights.
  7. Product Quality: You don’t always get what you pay for with an boat trailer lights, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an boat trailer lights is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining boat trailer lights information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding boat trailer lights is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: What lights should be on a boat?

A: Lights while under way are covered in Rules 20 through 29 of the Navigation Rules . Most vessels other than row boats are required to have a red light on their port (left) side, a green light on their starboard (right) side. The lights must be visible from the front and the sides, but not the rear, of the vessel.

Q: What are the best underwater LED lights for boats?

A: Underwater LED boat lights are great for any vessel. The best LED colors for attracting bugs and bait fish are green and white. Blue is also a nice color and has a short wavelength, and generates a beautiful aesthetic in the water at night.

Q: What are the best tires for a boat trailer?

A: The best boat trailer tire is the Freestar M-108 Radial that has a 8 ply construction with a load range of D, which has a max weight rating of 1,820 LBS.

Q: Are boat trailer lamps waterproof?

A: Boat trailers can have detachable lights and wiring where they may be immersed in water and cause short-circuiting. However, most of the LED trailer lights sold today are fully sealed and watertight during submersion.